LLowes Mill is a small, rubblestone-built building, probably dating from the early nineteenth century and being built on the Maesllwch Castle estate. It worked until c1920, and then became derelict and completely overgrown until being partially exposed in 2011. It consists of a two storeys and attic range aligned north-east to south-west, with a lower, two-storey wing to the south-east and a single-storey lean-to filling the angle between them. The principal elevation is the north-east gable, with doors at ground and first floor levels. The waterwheel was at the south-west gable, where the 22-inch diameter (0.56 metres) oak shaft remains in the wheelpit. The wheel was reported to be an overshot wheel 12ft (3.65 metres) in diameter, with iron shrouds (cast in Brecon) supported on a clasp-arm arrangement of wooden spokes. It drove two pairs of stones, and the internal machinery is thought to remain in situ. The detached mill house lies 35 metres to the north and has recently been restored. Beyond it is the weir which diverted water from the River Garth to a millpond above the mill.

Information from Cadw Listed Building database and G W Ridyard.
W J Crompton, RCAHMW, 1 October 2014.